<template>
    <view :class="[styleType === 'text'?'segmented-control--text' : 'segmented-control--button' ]"
          :style="{ borderColor: styleType === 'text' ? '' : activeColor }" class="segmented-control">
        <view v-for="(item, index) in values" :class="[ styleType === 'text' ? '': 'segmented-control__item--button',
		index === currentIndex&&styleType === 'button' ? 'segmented-control__item--button--active': '',
		index === 0&&styleType === 'button' ? 'segmented-control__item--button--first': '',
			index === values.length - 1&&styleType === 'button' ? 'segmented-control__item--button--last': '' ]"
              :key="index"
              :style="{ backgroundColor: index === currentIndex && styleType === 'button' ? activeColor : '',borderColor: index === currentIndex&&styleType === 'text'||styleType === 'button'?activeColor:'transparent' }"
              class="segmented-control__item" @click="_onClick(index)">
            <view>
                <text :style="{color:
				    index === currentIndex
				      ? styleType === 'text'
				        ? activeColor
				        : '#fff'
				      : styleType === 'text'
				        ? '#000'
				        : activeColor}" class="segmented-control__text"
                      :class="styleType === 'text' && index === currentIndex ? 'segmented-control__item--text': ''">{{
                    item }}
                </text>
            </view>

        </view>
    </view>
</template>

<script>
    /**
     * SegmentedControl 分段器
     * @description 用作不同视图的显示
     * @tutorial https://ext.dcloud.net.cn/plugin?id=54
     * @property {Number} current 当前选中的tab索引值，从0计数
     * @property {String} styleType = [button|text] 分段器样式类型
     *    @value button 按钮类型
     *    @value text 文字类型
     * @property {String} activeColor 选中的标签背景色与边框颜色
     * @property {Array} values 选项数组
     * @event {Function} clickItem 组件触发点击事件时触发，e={currentIndex}
     */

    export default {
        name: 'UniSegmentedControl',
        emits: ['clickItem'],
        props: {
            current: {
                type: Number,
                default: 0
            },
            values: {
                type: Array,
                default() {
                    return []
                }
            },
            activeColor: {
                type: String,
                default: '#2979FF'
            },
            styleType: {
                type: String,
                default: 'button'
            }
        },
        data() {
            return {
                currentIndex: 0
            }
        },
        watch: {
            current(val) {
                if (val !== this.currentIndex) {
                    this.currentIndex = val
                }
            }
        },
        created() {
            this.currentIndex = this.current
        },
        methods: {
            _onClick(index) {
                if (this.currentIndex !== index) {
                    this.currentIndex = index
                    this.$emit('clickItem', {
                        currentIndex: index
                    })
                }
            }
        }
    }
</script>

<style lang="scss">
    .segmented-control {
        /* #ifndef APP-NVUE */
        display: flex;
        box-sizing: border-box;
        /* #endif */
        flex-direction: row;
        height: 36px;
        overflow: hidden;
        /* #ifdef H5 */
        cursor: pointer;
        /* #endif */
    }

    .segmented-control__item {
        /* #ifndef APP-NVUE */
        display: inline-flex;
        box-sizing: border-box;
        /* #endif */
        position: relative;
        flex: 1;
        justify-content: center;
        align-items: center;
    }

    .segmented-control__item--button {
        border-style: solid;
        border-top-width: 1px;
        border-bottom-width: 1px;
        border-right-width: 1px;
        border-left-width: 0;
    }

    .segmented-control__item--button--first {
        border-left-width: 1px;
        border-top-left-radius: 5px;
        border-bottom-left-radius: 5px;
    }

    .segmented-control__item--button--last {
        border-top-right-radius: 5px;
        border-bottom-right-radius: 5px;
    }

    .segmented-control__item--text {
        border-bottom-style: solid;
        border-bottom-width: 2px;
        padding: 6px 0;
    }

    .segmented-control__text {
        font-size: 14px;
        line-height: 20px;
        text-align: center;
    }
</style>
